I actually procured this Egyptian anticataract eyedrop. But even one drop stung tremendously, with a burning sensation. It contains a protein de-aggregation agent, although I am unsure what type of cataracts it works on. But I learnt it also contains an anaesthetic, and if you need an anaesthetic to use an eyedrop, it must be bad. So I gave up on it. For simple protein de-aggregation, Lanomax, which does not sting, may be a better choice.